Hydraulic Piston Reseated, Spring Re-Tensioned – All Fixed Within 2 Hours
EAC Fire & Security was recently called out to an automatic barrier fault at a private car park in Poole. The barrier arm was stuck due to a mechanical failure within the spring tension system and piston assembly.
Why the Repair Was Needed
The fault was traced to a threaded piston that had worked loose from its upper eye bolt. This piston plays a key role in balancing the barrier boom arm by controlling the internal spring tension.
The issue developed over time due to:
- Seized adjustment threads
- Excessive strain from a possibly mismatched spring
- Movement of the piston while under load, causing it to back out from the thread
Left unresolved, the barrier could have failed completely—potentially damaging the boom arm or motor.
Full Mechanical Strip-Down and Fix
We attended site on a Saturday and carried out a full on-the-spot mechanical repair:
- Spring circlip removed and piston safely unthreaded
- Hydraulic ram bolts released top and bottom
- Piston re-threaded and reseated into the eye bolt
- Some hydraulic oil released to ease the realignment
- Seized spring adjuster freed using careful manual force
- Spring re-tensioned and circlip reinstated
- Full reassembly and realignment completed
Spring Was Underrated for Load
During inspection, we found that the spring strength did not match the weight of the current boom arm setup—suggesting accessories had been added to the arm without upgrading the internal spring.
Although we were able to get the unit operational, we advised the client that a stronger spring may be needed for long-term reliability.
Fast Fix for Critical Access System
The site relies on this barrier for vehicle access and security, so downtime wasn’t an option. Our engineers had the repair completed within 2 hours of the initial call, restoring safe and balanced operation for the customer.
Need Barrier Repairs or Maintenance?
If your gate or barrier is stiff, unbalanced or not responding, EAC Fire & Security can help. We provide reactive and scheduled support for automated access systems across Dorset and Hampshire.
Contact us today for responsive barrier repairs or a maintenance check.
